Oona Chaplin, who has been cast as Jeyne in Game of Thrones, has tweeted a picture of herself and Richard Madden (Robb Stark) on the set of season 2!

This picture seems to prove that Oona is indeed playing Jeyne Westerling, who as book fans know has a number of scenes with Robb, although she is not introduced until the third book, A Storm of Swords. Evidently, the writers have decided to include her character in earlier parts of the story.